        body{
			text-align: center;
			margin: 0px;
		}

		nav{
			float: right;
			margin-right: 20px;
		}

		li{
			float: left;
			margin-left: 20px;
			list-style:none; 
		}

		li a{
        	color: #333333;
        	font-size: 12px;
        }

        li a:hover{
        	color: blue;
        }

		.bd_logo{
			clear:both;
		}

		article{
			padding-top:100px; 
		}

		img{
			width: 270px;
			height: 129px;
			margin-top: 20px;
		}

		form{
            width: 654px;
            margin: 20px auto;
		}

		.input_text{
			margin-top: 20px;
			width: 540px;
			height: 22px;
			border:1px solid #CCC;  
			padding: 5px;
			outline: 0;
			float: left;
		}

		input.input_text:hover{
			border-color: #3385FF;
		}

		input.input_text:focus{
			border-color: #3385FF;
		}

		.btn_baidu{
			width: 100px;
			margin-top: 20px;
			height: 34px;
			font-size: 16px;
			color: #FFF;
			background: #3385FF;
			border: 1px solid #3385FF;
			float: left;
			cursor: pointer;
			outline: 0;
		}

		.more_product{
			width: 60px;
			height: 25px;
			font-size: 12px;
			color: #FFF;
			background: #3385FF;
			border: 1px solid #3385FF;
		}

        footer{
        	height:80px; 
        	position:absolute;
        	bottom:10px;
        	width:100%; 
        	clear:both;
        }